Metal working – Means to assemble or disassemble – Overedge assembling means
Patent
1991-05-03
1992-06-16
Jones, David
Metal working
Means to assemble or disassemble
Overedge assembling means
29243521, 7245317, B21J 1534
Patent
active
RE0339580
ABSTRACT:
A breakstem river installation tool includes a jaw mechanism (12) for gripping the stem of a rivet, and a pneumatically actuated piston and cylinder device (13) for applying pulling force to the jaw mechanism. It is provided with a damping valve (22) for damping the flow of air from the piston and cylinder device (13) when the force is suddenly released on breaking of a rivet stem (23), thereby to reduce mechanical shock to the tool, and noise of fast-escaping air. The damping valve (22) comprises a resilient steel circular disc (32) which is secured at its center to the apex of a domed member (28) provided with vent holes (26). The undeformed shape of the disc (32) is flat. When, in use of the tool, a rivet stem breaks and the restraining force on the piston (15) is released, the velocity of air flow past the disc (32) urges the disc to bend towards the domed surface of the member (28), thereby restricting the air flow through the vents (26). It may be that the valve closes completely, so that the peripheral edge (36) of the disc (32) contacts the annular valve seat (37) surrounding the air vents (26).
REFERENCES:
patent: 2525626 (1950-10-01), Stouffer
patent: 3088618 (1963-06-01), Pickford
patent: 3374656 (1968-03-01), Di Maio
patent: 4050285 (1977-09-01), Bosch et al.
patent: 4454746 (1984-06-01), Schwab
patent: 4815310 (1989-03-01), Summerlin et al.
Hendry James C.
Summerlin Frederick A.
Avdel Systems Limited, A British Company
Jones David
LandOfFree
Breakstem fastener installation tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Breakstem fastener installation tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Breakstem fastener installation tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1746748